Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-06-09
1996-09-10
LaBalle, Clayton E.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, H02K 122, H02K 127
Patent
active
055549039
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a rotary electric machine capable of being utilized as a motor and the like and, more particularly, a rotary electric machine constructed on the basis of a new operational principle, which is operated by using a magnetic repulsive force as its driving force.
BACKGROUND ART
Generally known motors, such as direct current motors, brushless direct current motors and the like, constitute a field system by a group of magnetic poles of both polarities of North magnetic poles and South magnetic poles and they are arranged to rotate a rotor by a magnetic attractive force, acting between the magnetic poles of opposite polarities of a stator and the rotor, as a major driving force.
Conventional motors constitute a field system by a group of magnetic poles of single polarity; however, there is not known a rotary electric machine based on a new operational principle that a rotor is rotated by a magnetic repulsive force acting between magnetic poles of both polarities of the rotor and a stator.
The object of this invention, however, is to provide a rotary electric machine which constitutes a field system by a group of magnetic poles of such single polarity and which is operated by utilizing a magnetic attractive force acting between magnetic poles of the same polarity of a rotor and a stator as a driving force.
DISCLOSURE OF INVENTION
In order to achieve the object as described hereinabove, a first aspect of this invention is to provide a rotary electric machine comprising a rotary electric machine of an inner rotor type, with a cylindrical rotor arranged concentrically inside a hollow stator at a distance of a gap; wherein said stator is arranged with a plurality of field magnets disposed in a spaced relationship along a circumferential direction on its surface directed to said rotor in such a manner that all magnetic poles of said field magnets on the side directed to said rotor have the same polarity; said rotor is mounted with a plurality of magnetic pole generating means comprised each of a rotor winding wound on its core, disposed along a circumferential direction on its surface directed to said stator, in a spaced relationship in accordance with the position in which said field magnet is disposed; a commutation mechanism is disposed for exciting a rotor winding of said rotor by a commutator and a brush; and said commutation mechanism is structured such that a rotor winding of said rotor is excited in the direction in which the magnetic pole of said rotor on the side directed to said field magnet generates the same polarity as that of the magnetic pole of said field magnet facing said rotor and that said rotor winding is excited at a timing when a combination of a magnetic repulsive force to be received from the field magnet disposed on the rear side in the rotational direction of said rotor with a magnetic repulsive force to be received from the field magnet disposed on the front side in the normal direction thereof turns into a force for urging the rotation of said rotor in its rotational direction, when said rotor winding is excited, because the magnetic repulsive force received from field magnet disposed on the rear side in the rotational direction of said rotor is greater than the magnetic repulsive force received from the field magnet disposed on the front side in the rotational direction thereof, and, on the other hand, that the excitation of said rotor winding is suspended at a timing when the rotation of said rotor in the normal direction is decreased because the relationship of the magnetic repulsive forces between the magnetic poles of said rotor and said field magnets is reversed.
In a second aspect, the present invention is to provide a rotary electric machine wherein, in the rotary electric machine as described hereinabove, said machine is of an outer rotor type in which said rotor is comprised of a hollow structure and said stator is disposed concentrically inside said hollow rotor at a distance of the gap, in place of the disposition of said r
REFERENCES:
patent: 155237 (1874-09-01), Hochhausen
patent: 3396296 (1968-08-01), Esters
patent: 3602749 (1971-08-01), Esters
patent: 4972112 (1990-11-01), Kim
patent: 5081388 (1992-01-01), Chen
patent: 5089733 (1992-02-01), Fukuoka
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